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2 Sheets-Sheet 1.

(No Model.)

H. PIEPER. LOOK MECHANISM FOR FIREARMS.

1T9. 5 9l, 2 9} Patented Oct-5, 1897.

(No Model.) 2 Sheets-Sheet 2.

H. PIEPER.

LOCK MECHANISM FOR FIREARMS.

Patented Oct 5, 189 7.

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UNITED STATES PATENT OEEicE.

HENRY PIEPER, OF LIEGE, BELGIUM.

LOCK MECHANISM FOR FIREARMS.

SPECIFICATION forming part of Letters Patent No. 591,291, dated October 5, 1897.

Application filed January 23, 1897. Serial No. 620,446. (No model.)

To all whom it may concern.-

Be it known that I, HENRY PIEPER, a subj ect of the King of Belgium, residing at Liege, in the Kingdom of Belgium, have invented certain new and useful Improvements in Look Mechanism for Firearms; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to looks for firearms with hammers having a circular motion.

The object in view is to produce a very simple lock composed of parts having a novel and very simple form. The mainspring is a coiled spring, which is so placed in the lock that during the stroke of the hammer it takes different inclinations and that its power, acting on the hammer, is disposed toward the same in a manner as to obtain the best possible effect.

In the accompanying drawings the invention is shown as applied to a carbine, Figures 1 and 2. Figs. 3, 4, and 5 show the device as applied to a shotgun with rebounding hammer, some of the parts being shown in crosssection. Figs. 6 and '7 show the same lock in a slightly-modified form. Fig. 8 represents a lock having the mainspring in the rear instead of in front. Figs. 9 and 10 show in detail the spring-rod and the mainspring, respectively. Fig. 11 shows in detailed side and top view the inner trigger, sear, or tumbler, with spring and spring-bolt. Fig. 12 is a cross-section through the revolving nut carrying the hammer, the surrounding casing, and the outer lock-plate. Fig. 13 is a crosssection through the said lock-plate, showing a circular groove as seat for the casing. Fig. 14 shows said casing in elevation and crosssection, and Fig. 15 shows in front and side elevation the revolving nut provided with notches for the scar and mainspring. Figs. 16 and 17 illustrate the application of my invention to a gun-lock in connection with a cartridge-extractor.

The tumbler E, Fig. 15, is provided with a laterally-projecting cylindrical pin moving in a corresponding bore of the lock-plate T and carrying on the outside the hammer. It is perforated longitudinally, as indicated by E This nut is inclosed in a circular casing U,

having in the center a small projecting stud U, which enters into the bore E of the tumbler. The rim U of this casing is adapted to fit into a circular groove V, Fig. 13, cut into the inner face of the lock-plate T, against which the casing is secured by screws in the ordinary manner.

The rim U of the casing is cut away on one side to allow the mainspring to enter and come in contact with the tumbler, while a corresponding opening on the other side allows the sear X to pass. The fulcrum of the latter is a pin partly inserted in a hole of the lock-plate and partly in the body of the casing U. A small coiled spring 7" is placed in a bore of the body of the sear, pressing with one end against the bottom of said bore and with the other end against the head of the pin r, thus forcing the latter against the casingU and giving the sear a tendency to lean against the rim of the tumbler E. The mainspring R, also being a coiled spring, surrounds a rod A, leaning with one end against the guide-stud D, secured to the lock and suitably perforated to guide the rod A. The other end of the mainspring presses against the head A of the rod A. The tumbler E is provided with the ordinary notches for the rebound and armed positions of the hammer. It is also provided With a rounded projection E, against which the head A of the rod A presses.

The stroke of the rod A is limited by a collar A, (see Figs. 3, 4, 5, 8, and 9), securely attached to the end of the rod A and adapted to strike against the fixed stud D.

WVhen cooking the hammer, Fig. 4, the

spring R is compressed between the stud D and the head A of the rod A.

When the trigger is pulled, the spring R throwsthe hammer down, Fig. 5, whereby the rod A, being limited in its forward motion, follows the hammer-tumbler only so far as to allow the sear to fall into the reboundnotch, equivalent to the position indicated in dotted lines in Figs. 5 and 7. The rest of the stroke of the hammer to effect the percussion is obtained by the momentum of the hammer alone. Thus the latter is free from any pressure after having performed the percussion and naturally rebounds, so that the sear, pressed by its spring 4", Fig. 5, falls into the ICO notch S, securing the hammer in the rebound position andholding again the projection E in contact with the head A of the rod A.

As shown in Fig. 8, similar dispositions are madefor the parts when the mainspring R is placed in the rear of the tumbler.

The modification shown in Figs. 6 and 7 consists in the provision of two projections of the tumbler E and E in combination with a suitable enlarged head A of the rod A,coming in contact with the second projection E to bring the hammer back into the rebound position after the percussion. When in-a lock bler comes in contact with the enlargement of the head A and slightly presses thespring R back again by the momentum of thev ham.- mer. This back pressure is sufficient to bring the hammer back into the rebound position after its having effected the percussiomFig. 6.. In Figs. 1 and 2, showing a lock in normaland armed positions as applied to a carbine,

the mainspringR is carriedby a rod A,. which is pivotally connected to a projection of" the hammer, and the-free end of therod A glides notches of the hammer by a small coiled spring 0", placed in a corresponding bore of the triggerandcompressing against the middle.

of the; guard.

In the different devices above described thepressure transmitted by the spring. R on the hammer is directed at different-distances of its arc, according to the position of the hammer, and, as the figures indicate, the more thespr-lng is compressed the more its action is disposed toward the axis or fulcrum of the hammer.

The point ofattaching the hammer can be' obtained either by simple contact, as shown in Figs. 3, 4, 5, 6, 7., and8, or by means oflthe articulation, as shown in Figs. 1' and 2.;

In Figs. .16 and 17, where the hammer works in connection with a cartridge-extractorT, the latter of course is perforated, carrying a pin, through the medium of whichthe hammercauses the ignition of the cartridge in the ordinary well-known manner. The fig? ures illustrate how the coiled-spring W acts on the head WV of the rod or bolt A and how Having. thus described my invention,. I

claim 1. In a gun-lock a coiled mainspring guided on arod or bolt provided ononeend with a collar adapted to limit the expansion of the spring and provided on its other end with a 'head'contacting with the hammer at a point near its pivot in combination with a trigger ffulcrumed in the, ordinary manner to the frame of the gun-lock and provided in a bore near its pivot with a coiled spring adapted to press the trigger against the hammer sub- .stantially as described.

2. In mechanism for discharging firearms, a hammer-tumbler provided with a laterally- :projecting-cylindrical pin adapted to move in a corresponding bore of the lock-plate and carrying on its outer end a hammer, said tumbler being inolosed in a circular casing and having aprojectiouto be acted upon by I the mainspring and having notches to receive the'tongue of the sear or trigger, which is pivotally secured in a suitable-cutout of the casing, and which carries in a bore a small coiledspring adaptedto-press the sear against the notches of the hammer in combination with a coiled mainspring surrounding a rodlor bolt the headof which passing through: asuitable cut-out: withinthe casing, engages withthe projectionsof' the tumbler, said rod orholt'being limited in its forward motion by a collar secured to its end so that after havinggeffected-the percussion the-ham- ;mer is-free to rebound and isheld in a' partially-cocked position by the spring actuated 18621.1, substantially as described.-

: 3.. In mechanism for discharging firearms, a hammer-tumbler provided with a laterallyprojecting. cylindrical pin adaptedto move ma-corresponding borebf the lock-plate and carrying on its outer end a hammer, said tumbler being inclosed in a circular casing, having two projections E and E to be acted upon by the mainspring and having notches to receive the tongue of-thezsear or trigger,

iwhich is pivotally'secured in a suitable cutout of: the casing, and which carries in a bore asma11 coiled spring adapted to press-the lsear against the notches of the hammer in icombination with a coiled'mainspring surgrounding: a rod or bolt'the-head of which, ipassing through a suitable cut-out within-the leasing, engages with the projections ofthe tumbler, first with E to throw the hammer idown and then with E after it performs the percussion, so as to throw the hammer back into the rebound position, substantially as described.

' In testimony whereof I affix my signature inpresence-of two witnesses.

HENRY PIEPER.

vWitnesses:

L. CAMPENN-E, J OHN GRAT-T. 

